Li Yunxia, Yang Shimin, Yan Yantao
College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China.
College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China.
Mar Pollut Bull. 2022 Jan;174:113189. doi: 10.1016/j.marpolbul.2021.113189. Epub 2021 Dec 2.
The structural characteristics of phytoplankton communities and their relationship with environmental factors were analysed based on survey data from the central South China Sea in summer 2020. A total of 416 separate taxa from 90 genera and 4 phyla were identified, with an average cell abundance of 572.98 cells/L. The dominant phytoplankton species were Nitzschia spp., Gyrodinium spp., Synedra spp. and Navicula spp. The Shannon-Wiener index ranged from 2.25 to 4.98, and the evenness index varied from 0.48 to 0.93. Correlation analysis showed that total cell abundance was negatively correlated with salinity, nitrate and silicate and was positively correlated with nitrite. Compared with the historical data, Thalassionema nitzschioides was cited repeatedly in previous researches as the dominant species. In addition, the Shannon-Wiener index showed an overall increasing trend over time, and the community structure is becoming more stable.
基于2020年夏季中国南海中部的调查数据，分析了浮游植物群落的结构特征及其与环境因子的关系。共鉴定出4门90属416个分类单元，平均细胞丰度为572.98个/升。浮游植物优势种为菱形藻属、裸甲藻属、针杆藻属和舟形藻属。香农-威纳指数在2.25至4.98之间，均匀度指数在0.48至0.93之间。相关性分析表明，总细胞丰度与盐度、硝酸盐和硅酸盐呈负相关，与亚硝酸盐呈正相关。与历史数据相比，拟菱形藻在以往研究中多次被列为优势种。此外，香农-威纳指数总体呈随时间增加的趋势，群落结构变得更加稳定。
